Improvement in journal-boxes for shafts of stone-crushers



J. F. WOOD; Journal-Box for Shafts of Stone-Crushers.

No. 218,847. Patented Aug 26,1879.

NJEYERS. PROTDUTNOGRAPNER. WASHINGTON l5 UNITED STATES PATENT QFFIonJOHN F. WOOD, BOSTON, MASSACHUSETTS.

IMPROVEMENT IN JOURNAL-BOXES FOR SHAFTS 0F STONE-CRUSHERS.

Specification forming part of Letters Patent No. 218,847, dated August26, 1879; application filed February 8, 1879.

To all whom it may concern. Be it known that I, JOHN F. W001), ofBoston, county of Suffolk, and State of Massachusetts, have invented anew and useful Improvement in the Construction of Boxes for theProtection and Lubricating of the Main Shafts of a Crusher for theGrinding of Stone, Ore, Emery, or other hard material, and in the mannerof placing said boxeson said shafts, and the lining and packing thereof.

1 will proceed to describe my invention as follows, reference being hadto the accompanying drawings, which form partof this specification, likeletters representin gthe same parts shown in the different figures.

Figure 1 shows a perspective view of the crusher embracing my invention;Fig. 2. a sectional view of shafts, boxes with round trunnions, liningsof the same, slotted covers and base-pieces, elastic bearin gs, wedges,and fixed partition; and Fig. 3 shows a sectional view of the box placedupon the shaft.

A, Fig. 1, represents the two rolls of a crusher, and B shows the shaftsupon which said rolls are placed. 0 represents boxes, four in number,there being one at each end of each shaft, and occupying the entirespace between the roll and the end of the shaft. In these boxes isfitted what, may be called a semi or half lining, a, made concave, as isusual in such a device. This lining is to be placed in the side of thebox next to the wedge H, and opposite the shaft B, and extending aroundunder said shaft, so that it may receive the full and entire bearing ofthe shaft. This halflining, may be made of any metal that is softer thanthe shaft, as usual in such cases. In the opposite half of the box maybe packed waste, (shown by c, Fig. 2,) saturated with oil or otherlubricating material, the object of which is obvious.

On each box, and cast with and forming part of the box, are two roundtrunnions, D and 1), one on the top and one on the bottom of the box. Inthe two covers E and in the two basepieces M are made elongated slots,said slots being elongated longitudinally of said covers andbase-pieces,and are shown by d and d in Fig. 2.

It may readily be seen that in case a piece of stone or other matter toolarge and hard to be run between the rolls A without breaking orinjuring the said rollsor shafts, the rolls and shafts, and, infact, allpart-s of the machine, are relieved from undue pressure and consequentinjury by the ease with which the trunnions D and D are enabled to moveback and forth in said elongated slots (1 and d when caused so to moveby undue pressure between the rolls A.

The trunnions D and D, being made round,

are enabled to take a compound motion--the longitudinal and circularandthus are made entirely self-adjustable to and with the main shafts.

The lining of the boxes 0 being composed of half-waste, which is elasticand compressible, the shaft is permitted to take the adjusting motion,as described. Thus it appears that in order to produce the adjustingmotion of the boxes 0 so necessary to the successful operation of thisappliance as well as the motion in a longitudinal direction, roundtrunnions and lining of half-waste or other equally elastic andcompressible material are important. For instance, a piece of rock orother hard matter is brought between the rolls at any point between thecenter and one end of said rolls, when instantly the boxes at this endmove in an outward direction, and the boxes at the opposite end at thesame time move in an inward direction by means of the round trunnionsand slots before described 5 and if the saidhard matter should by chancecome between the rolls at exactly the central point, all four boxeswould take an outward direction, and thus in any event the shafts,rolls, boxes, and, in short, all parts of the appliance are protectedfrom strain or breakage.

Another very important advantage gained by my invention is that, in casethe rolls become worn so as not to crush equally through-- out theirentire length, the wedges H may be moved in an inward direction at theend, between which and the center of the rolls the wear has occurred,until the space between the rolls is again made equal and uniformthroughout their entire length-that is to say, the wedges H may be movedas far as the length of the slots 61 and d will permit. When said wedgesare required to be moved, as before described, keys of iron or steel ofthe thicki miss required may be driven'inj between the wedges and theoutside walls-,4), inorder to hold the wedges in their proper places.

The wedges herein described are made tapering, being thicker at the topthan at the bottom, so that in case, a piece of rock, or other hardmaterial too large to be passed between ,the rolls, even with the use ofmy invention,

should become wedged-between said rolls the rolls, shafts, and all partsof the appliance may be relieved from undue pressure by merely startingthe wedges at one or both ends of the appliance from the bottom;whereas, if said sary, be protected by covers in the ordinary manner ofprotecting packing-boxes.

L represents a fixed partition, to serve as a hearing, if in any eventthe boxes should be forced to that. extremity. by. pressure caused byrock or' other hard material passing between the rolls A; and the inwardends of the elongated slots d and d being brought to within.

just the distance from the side of the partition L thatintervenes'bctween the circumferences of the trunnions D and D, and theinside edge of the box G, sothat if,on. account of wear upon the rolls Ait is desired to move the boxes '0 in an inward direction by the processof keying, hereinbefore described, said boxes maybe moved until theirsides shall bear a'gainstthe.

' 'c'and waste a, saturated with lubricating ma- H partition L. -Ifdesired, pieces of elastic packing may be p'lacedbetween the box orboxes .0 and the fixed partition L, in the same manner and for the samepurpose that they are placed between the boxes 0 and the wedges H.

i In order to save time and trouble thetop of" the wedgeflHnlay be cutoff horizontallyat about'one third of the distance betweenthe top andbottom of said wedge, a bolt inserted in the top of the wedge at amedium point between each end thereof, this bolt being perpendicular tothe top surface of the wedge,

and passing through the cover E by means of tween them, as hereinbeforedescribed, using the cover E as the fulcrum for said lever.

. It Will bevseen that by this means the wedge H-may be'raised' andagain lowered into place, and-the time and trouble required in removingthecovers E avoided.

I claim 'as my invention-- '1. The box 0, with round trunnions D and Dand linings for adjustment, 0 and 0, constructed and combined with theshaft B, substantially, in the manner described, and for the purposesset forth.

2. The method of arranging theboxesO upon the shafts B, with the roundtrunnions D and D, placed within the elongated slots 01 and 61, so that]said trunnions may move back and forth therein and take on a limitedcircular motion atlf the same time, substantially in the manner-andforthe purposes described.

3. The method of placing the semi or half metallic lining 0 and waste aas packing, saturated with oil or other lubricating material, within theboxes 0 and around the shaft B, substantially in the manner and for thepurposes set forth.

4.; In combination, the box 0, with round trunnions D and D, semi orhalf metallic lining'cpa' n'd waste 0, saturated with lubricatingmaterial, with the cover E, and base-piece M,

with elongatedslots (1 and d made therein, and with the shaft B,constructed and arranged substantially in the manner described, and forthe purposes specified.

I In combination, the boxes 0, with round trunnions D and D and halfmetallic lining terialgtheshafts B, the covers E, and basepieces M, withelongated slots d and cl made therein'ithe elastic bearings I, thetapering Wedges'H, with eyebolts, and lever, the outside walls, O, thefixed partition L, and rolls A, all'constructed and arrangedsubstantially in the manner described, and for the purposes set forth.

. JOHN F. WOOD.

In presence of- OHAs. ALLEN TABER, .GEo. S. BoUTwELL.

